I-75 SB over Au Sable River

Fair Condition66 years old8,125 vehicles/day

Location

StateMichigan
CountyCrawford
Location0.7 Mi N Of M-72
CarriesI-75 SB
CrossesAu Sable River
Coordinates44.66630, -84.69706

Condition Ratings

Overall ConditionFair
Deck5 (Fair)
Superstructure6 (Satisfactory)
Substructure6 (Satisfactory)
Channel/Waterway6 (Satisfactory)
Scour Critical3 — Scour critical

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length68.9 ft (21 m)
Max Span67.3 ft (20.5 m)
Deck Width47.2 ft (14.4 m)
Deck Area302.4 sq m
Main Spans1
Year Built1960

Traffic

Avg Daily Traffic8,125 (2022)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last Inspection524
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number000000000002038

Nearby Bridges

I-75 NB over Au Sable River 0.0 mi Fair N Down River RD over I-75 NB 0.3 mi Fair N Down River RD over E Br Au Sable River 0.5 mi Good Maple ST over Au Sable River 0.7 mi Fair I-75 NB over M-72|huron ST 0.7 mi Poor I-75 SB over M-72|huron ST 0.7 mi Poor I-75BL|M-72|N Jame over Au Sable River 0.9 mi Fair I-75 SB over Lake State Rr 1.0 mi Poor I-75 NB over Lake State Rr 1.0 mi Poor I-75 SB over E Br Au Sable River 1.5 mi Fair